Investigate false WebPageTest LCP alerts
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	Peter
	Jan 11 2022, 8:55 AM

Description

Its something strange going on with the alerts for WebPageTest. Earlier today (9:02 AM CET) I got an email alert for LCP en enwiki:

Screenshot 2022-01-11 at 09.49.55.png (692×1 px, 389 KB)

But when I test the alert manually it do not fire and I can see that the threshold is below the level. Looking at the current status it says that the alert has been ok for five days:

Screenshot 2022-01-11 at 09.54.10.png (756×2 px, 409 KB)

Related Objects

Mentioned In: T299886: Upgrade to Chrome 97 increased first visual change metrics for synthetic testing
T282863: Upgrade Grafana to 8.x
Mentioned Here: T282863: Upgrade Grafana to 8.x

Event Timeline

Peter created this task.Jan 11 2022, 8:55 AM

fgiunchedi mentioned this in T282863: Upgrade Grafana to 8.x.Jan 17 2022, 10:45 AM

I suspect this has to do with Grafana 8 test instance at grafana2001 evaluating alerts and for some reason (to be investigated) reaching different conclusions about the alert's state (cfr T282863: Upgrade Grafana to 8.x)

Peter moved this task from Inbox, needs triage to Radar on the Performance-Team board.Jan 18 2022, 6:35 PM

Peter edited projects, added Performance-Team (Radar); removed Performance-Team.

Krinkle moved this task from Limbo to Watching on the Performance-Team (Radar) board.Jan 18 2022, 9:26 PM

Peter mentioned this in T299886: Upgrade to Chrome 97 increased first visual change metrics for synthetic testing.Jan 24 2022, 10:19 AM

Peter removed Peter as the assignee of this task.Jan 24 2022, 7:36 PM

This has been fixed but nothing done at our side.